SUPERCONDUCTIVITY AND CHEMICAL-COMPOSITION OF THE HIGH-TC PHASE (TC - 111K) IN THE SB-PB-BI-SR-CA-CU-O SYSTEM

被引：5

作者：

KIJIMA, N

GRONSKY, R

ENDO, H

OGURI, Y

MCKERNAN, SK

ZETTL, A

机构：

[1] MITSUBISHI KASEI CORP,RES CTR,MIDORI KU,YOKOHAMA 227,JAPAN

[2] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1991年 / 30卷 / 1B期

关键词：

SUPERCONDUCTOR; SB-PB-BI-SR-CA-CU-O SYSTEM; CHEMICAL COMPOSITION; ENERGY DISPERSIVE X-RAY SPECTROSCOPY; ELECTRICAL RESISTIVITY; MAGNETIC SUSCEPTIBILITY; X-RAY POWDER DIFFRACTION;

D O I：

10.1143/JJAP.30.L99

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A superconducting phase with a critical temperature of 111 K in the Sb-Pb-Bi-Sr-Ca-Cu-O system has been synthesized by means of a long firing period. Its crystal structure is similar to the high-T(c) phase (107 K) in the Pb-Bi-Sr-Ca-Cu-O system, and its average chemical composition is 4.3%, 2.6%, 19.2%, 21.4%, 15.8% and 36.9% for Sb, Pb, Bi, Sr, Ca and Cu, respectively. The summation of the Sb concentration and the Ca concentration is approximately the same for all the samples of this phase, implying that Sb substitutes for Ca, and oxygen atoms are introduced to compensate the oxygen deficiency in the central Cu-O layer sandwiched by the two Ca layers in the crystal structure of the high-T(c) phase.

引用

页码：L99 / L102

页数：4

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